| 摘要: |
| 【目的】明确不同来源菊芋种质资源品质性状间的差异，为菊芋专用新品种的选育及菊芋功能产品的研发奠定基础。【方法】以菊芋种质资源圃中来自法国的14份、丹麦的11份和我国的4份菊芋种质资源为材料，测定块茎的干物质及主要品质性状（可溶性糖、果聚糖、蛋白质、粗纤维、黄酮、淀粉含量），并进行了品质性状与颜色及干物质的相关性分析，探讨了不同资源的遗传多样性。【结果】不同来源菊芋资源的品质性状存在丰富的变异，变异系数最大的为黄酮含量。通过多变量的主成分分析可知，前4个主成分（果聚糖、可溶性糖、蛋白质、黄酮）代表了菊芋品质多样性的86.073 1%的信息。由相关性分析可知，干物质与黄酮、果聚糖含量呈极显著正相关，与颜色呈显著正相关；黄酮含量与颜色呈极显著正相关；果聚糖含量与颜色也呈显著正相关；蛋白质含量与粗纤维含量呈显著负相关。聚类分析结果显示，29份菊芋种质资源可划分为3个类群，并且3个类群种质含量最高的均为可溶性糖，其次为果聚糖。结合聚类与主成分分析结果，发现果聚糖、可溶性糖含量是决定菊芋品质性状的两个主要因子。【结论】明确了不同来源29份菊芋种质资源块茎间营养成分的差异，并筛选出了特异的菊芋种质资源。 |
| 关键词: 菊芋 种质资源 品质性状 遗传多样性 |
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| 基金项目:国家自然科学基金项目（31660569）；青海大学昆仑学者专项；青海省蔬菜遗传与生理重点实验室项目（Sczdsys-2017-02） |
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| Diversity analysis of quality characters of Helianthus tuberosus Linn from different sources |
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ZHAO Mengliang,LIU Mingchi,ZHONG Qiwen,et al
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| Abstract: |
| 【Objective】This study investigated the differences in germplasm resources nutrients between Helianthus tuberosus Linn from different sources to provide basis for its function product development.【Method】The tuber dry matter and main quality traits (soluble sugar,fructan,protein,crude fiber,flavonoids,and starch content) of Helianthus tuberosus Linn resources including 14 from France,11 from Denmark and 4 from China were measured and correlation analysis between them was conducted to analyze the genetic diversity.【Result】There were abundant variations in quality of Helianthus tuberosus Linn resources and flavonoid content had the maximum variation coefficient.Multivariate principal component analysis showed that the first four principal component (fructan,soluble sugar,protein,and flavonoids) accounted for 86.073 1% of the quality diversity.Correlation analysis showed that dry matter had extremely significant positive correlation with flavonoids and fructosaccharide,and significant positive correlation with color.Contents of flavonoids and fructan were positively correlated with the color.Protein content was significantly and negatively correlated with crude fiber content.Based on the clustering results,the 29 of Helianthus tuberosus Linn clusters were divided into three groups,and soluble sugar had the highest content,followed by fruit sugar.Combining clustering and principal component analysis,it was found that fructan and soluble sugar content were two main factors determining the quality traits of Helianthus tuberosus Linn.【Conclusion】The differences in resources tuber nutrient composition of 29 Helianthus tuberosus Linn from different sources were determined and specific Helianthus tuberosus Linn germplasm resources were selected. |
| Key words: Helianthus tuberosus Linn germplasm resources qualitative character genetic diversity |
